"Microsoft tests all Xbox 360 games with our [backwards compatibility] emulator to ensure a quality experience across a breadth of titles," said Microsoft's Larry "Major Nelson" Hryb. "Due to an error, some of the games currently in test were accidentally made available. We have since removed access to those games, and apologize for any confusion this may have caused. We will have more information on upcoming releases soon."

With Dark Souls now having been confirmed, a Red Dead Redemption announcement may be on the way soon too.